<!DOCTYPE html>
<html>

	<head>
		<meta charset="UTF-8">
		<title></title>
	</head>

	<body>
		<picture>
			<source media="(min-width: 800px)" srcset="images/head.jpg, images/head-2x.jpg 2x">
			<source media="(min-width: 450px)" srcset="images/head-small.jpg, head-small-2x.jpg 2x">
			<img src="images/head-fb.jpg" srcset="images/head-fb-2x.jpg 2x" alt="a head carved out of wood">
		</picture>
	</body>

</html>